CN103698264A - Accelerated-corroding device for metal parts of transformer station and corrosion evaluating method - Google Patents
Accelerated-corroding device for metal parts of transformer station and corrosion evaluating method Download PDFInfo
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Abstract
The invention discloses an accelerated-corroding device for metal parts of a transformer station and a corrosion evaluating method thereof. The corroding device comprises a main box body which is divided into an upper part, a middle part and a lower part by a moisture partition plate and a heat partition plate, wherein the upper part of the main box body is equipped with a control panel; a humidity display, a temperature display, a corrosion gas display and a PLC (Programmable Logic Controller) module are arranged on the control panel; various sensors and metal hanging sheet suspending devices are arranged inside the box body. The corroding method comprises the following steps: hanging metal hanging sheets on a storage rack; introducing etchant gas generated by an etchant gas generating device into the device; controlling temperature, relative humidity and volume fraction of the etchant gas; and after a corrosion experiment is finished within a determined time, taking average surrosion in the unit area of hanging sheets as accelerated corrosion evaluating method for metal parts of the transformer station. The accelerated-corroding device disclosed by the invention is low in manufacturing cost and precise in experimental condition parameter control, simulates metal corrosion under different environments and provides suggestions with a reference value for transformer station construction and daily maintenance.
Description
Technical field
The invention belongs to corrosion technology field, especially a kind of transformer station metal parts accelerated corrosion evaluation method and device.
Background technology
In recent years because pollutant in atmosphere increases, be exposed to the impact that transformer station's metal parts of being on active service in atmosphere is alternately changed by Natural environment factors temperature/humidity not only, also will suffer the impact of chemical pollutant in atmosphere, these metal parts are very easy to corrode simultaneously.
The corrosion and protection technical research Yi Bei State Grid Corporation of China of power transformating and supplying facility lists " 12 " program for the development of science and technology in, and call energetically within the scope of Guo Wang company and carry out the Study on Problems such as the corrosion of electrical network key member and protection comprehensively, strong for building " intelligent grid " provides strong technical support.In recent years, Novel heavy anticorrosive paint and the resistant material of high performance, resistance to weather extremes, acid rain resistant, multi-functional, ornamental strong, economy, environmental protection low toxicity, long service life constantly occur, but be subject to the restriction of economy and service condition, existing facility is difficult to change and process, carry out facilities environment evaluation, according to environmental evaluation result, carry out and overhaul targetedly and processing seems very important.Therefore, in the urgent need to a kind of transformer station metal parts accelerated corrosion device, obtain by experiment accelerated corrosion evaluation method, with this evaluation method, instruct actual conditions, not only can before have an accident, extract and take measures, but also can be cost-saving, guarantee power supply safety, to national economy rapid growth and social stability important in inhibiting.
All there is certain defect in domestic published various accelerated corrosion experimental provisions at present.Publication number " CN101685061A ", the file of open day on 03 31st, 2010 discloses simulated acceleration test method of testing and the device of the corrosive nature of a kind of metal in atmosphere, is characterized in by test button being immersed to the NaHSO of 0.01 ~ 0.02 M
3in the acid solution of solution, soak, be positioned over again under infrared lamp and irradiate, using the average corrosion weight loss of sample unit area as the evaluation index of metal atmospheric corrosion resistance, but in actual conditions, there is a certain distance in the corrosion of test button in atmospheric environment and the corrosion in bulk solution, and it is also variant that metal corrodes the corrosion product structure obtaining under the corrosion product structure that obtains and atmospheric environment in bulk solution, the metal accelerated corrosion evaluation method obtaining thus can not be released the corrosion condition in Real Atmosphere situation, by weight-loss method, evaluate the corrosion resistance precision of metal in atmospheric environment not high simultaneously.Granted publication number " CN2758751Y ", the patent document of on 02 15th, 2006 Granted publication day discloses a kind of tester for outdoor atmosphere corrosion accelerating, its feature sprays water accelerated corrosion by top, yet in real atmosphere environment, metal parts is not only subject to the impact of rainwater, but also be subject to the impact of corrosive gas in atmosphere, and singlely by water spray, to accelerate metal erosion and can not obtain accurate corrosion information, the effect of having ignored corrosive gas can cause the distortion of experimental data.Granted publication number " CN201130145Y ", Granted publication day is that the patent document on October 08th, 2008 discloses a kind of Multifunctional environmental control accelerated attack laboratory box, be characterized in motor driving shaft bar, test button is immersed in solution, by external corrosive gas bottle, provide corrosive gas to simulate the corrosion condition under varying environment, although this experimental box can be simulated corrosion of metal situation under varying environment, can not accurately control relative humidity and temperature in experimental box.
In sum, by solution environmental, simulate metal erosion under actual gas environment and can not obtain corrosion information accurately and reliably, transformer station's metal parts is subject to various factors in atmospheric environment simultaneously, can not only carry out the experiment of single factors, also need to consider metal erosion situation under two kinds or two or more corrosive gas environment.Therefore, seek a kind of energy accurately, that the metal erosion data that effectively obtain in case are by experiment set up evaluation method is extremely urgent.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of transformer station metal parts accelerated corrosion device, this device can accurately be controlled parameters such as the temperature of experimental enviroment, relative humidity and etchant gas air inflows respectively, improve reliability, the reappearance of test, and can realize the Fast Evaluation of accelerated corrosion test.
The present invention also provides a kind of corrosion evaluation method.
For solving the problems of the technologies described above, the technical scheme that transformer station of the present invention metal parts accelerated corrosion device is taked is: it comprises a main box, and described main box is divided into three of upper, middle and lower part by the thermal insulative board every wet plate and top that is positioned at its underpart;
Wherein, main box top is arranged with control panel, is provided with wetness, temperature indicator, etchant gas display and PLC control module on described control panel;
The middle part of main box is provided with experimental box body, described experimental box body inside is provided with rack, described rack is provided with metal lacing film to be tested, the bottom of described experimental box body is provided with electric hot plate and circulation exhaust fan, humidity sensor in being provided with in described experimental box body, temperature sensor and etchant gas sensor, described humidity sensor, temperature sensor and etchant gas sensor respectively with wetness, temperature indicator, etchant gas display, described humidity sensor, temperature sensor and etchant gas sensor all connect the respective pin of PLC control module, the top of described experimental box body is provided with escape pipe,
The bottom of main box is divided and is provided with etchant gas generating means and saturated air bucket, described etchant gas generating means is communicated with draft tube, described saturated air bucket connects experimental box body through gas piping, described etchant gas generating means connects gas piping by the pipeline of provided with electromagnetic valve, and described gas piping is connected with the gas meter being arranged on experimental box body.
Further improve, the present invention also comprises the atomizer of being located at experimental box body top, and described atomizer is communicated with the reserve tank that is positioned at main box bottom via the pipeline with pump, the control termination PLC control module of described pump.
Further improve, the present invention also comprises salt fog device, this salt fog device comprises salt atomizing nozzle and the dehumidifier that is positioned at experimental box body bottom, described salt atomizing nozzle is connected with draft tube by the pipeline with gas control valve, described dehumidifier and salt atomizing nozzle are in same level, dehumidizier is equipped with in its inside, and the control end of dehumidifier is connected with PLC control module.
Preferably, in described experimental box body, be provided with the buffer board matching with gas piping air intake opening position.
Preferably, described wetness, temperature indicator, etchant gas display and PLC control module are in same level, and described main box sidewall is provided with exhaust fan.
Preferably, described electric hot plate and circulation exhaust fan are in same level.
Corrosion evaluation method of the present invention completes by above-mentioned transformer station metal parts accelerated corrosion device, and the method comprises the following steps:
1) metal lacing film is processed: metal lacing film is first used sand papering before carrying out corrosion experiment, till polishing successively and cannot see to the front vestige of once polishing by 3#, 5#, 6# order from coarse to fine, while changing the polishing of sand paper model at every turn, polishing direction changes 90 degree, polish to metal lacing film surface-brightening as mirror, then with distilled water, clean, then putting into absolute ethyl alcohol cleans, finally with acetone, fully clean, after cleaning, cold wind dries up, with epoxy resin, seal again four limits of metal lacing film, put into the exsiccator that fills silica gel and store; Each every group of parallel sample of test material is 3, and metal lacing film is rectangular parallelepiped, and its length * wide * height is 50 * 25 * 2 mm, and the thickness of application epoxy resin is at 1～10 mm;
Before carrying out corrosion experiment, the metal lacing film weight that successively twice measurement made, the result of measuring weight for twice differs at 0.1mg, can be for carrying out corrosion experiment; Metal lacing film records its original weight before putting experimental box into, and with fine rule, metal lacing film is hung on rack, and the suspension height of each metal lacing film is consistent;
2) corrosive gas that etchant gas generating means is produced enters in experimental box body, control temperature, relative humidity and the volume fraction of corrosive gas, complete after stipulated time corrosion experiment, using the average surrosion of lacing film unit area as transformer station's metal parts accelerated corrosion evaluation method; According to experiment needs, open gas control valve and pump;
Described metal lacing film takes out 3 as one group, with the average weight gain calculating corrosion rate of 3 lacing film unit areas after each accelerated corrosion experiment.
Preferably, the temperature of described etchant gas is controlled at 25～40 ℃, and relative humidity is controlled RH and is controlled at 40～90%, and volume fraction is controlled at 0～100 ppm.
Principle of work of the present invention is: after the etchant gas that air produces with etchant gas generating means after saturated air bucket reaches constant temperature and humidity mixes, via gas meter, enter in experimental box body, experimental box body bottom electrical hot plate adds hot-air, by circulation exhaust fan, make hot-air in main tank body-internal-circulation, thereby realize experimental box body heating, and dehumidifier switch is connected with PLC control module, according to the automatic Push And Release of humidity of setting.For meeting the corrosion of simulation metal lacing film under different condition, be provided with water spray and salt fog device simultaneously.For controlling charge flow rate, the present invention is provided with gas meter on experimental box body, thereby realize, accurately controls gas flow; Excessive for preventing from entering the gas velocity of experimental box body, buffer board is equipped with in the present invention in experimental box body, can effectively slow down gas velocity, avoids air-flow to impact experimental result, for avoiding experimental box body excess Temperature, the present invention is equipped with exhaust fan in main tank body wall side.
Adopt that technique scheme produces beneficial effect be:
(1) the effective content of gas in monitoring experiment casing of etchant gas sensor, the sensors such as the temperature arranging, humidity and gas meter adopt PLC control module to control, can automatically control by the interior all circuits that are connected in this module of implement device, reduce artificial amount, improve conventional efficient and degree of accuracy;
(2) when experimental box body temperature is during higher than setting value, electric hot plate can stop heating automatically, and exhaust fan starts simultaneously, realizes the reduction of experimental box body temperature by introducing outdoor air;
(3) buffer board is equipped with in experimental box body inside, can reduce gas flow rate, avoids to greatest extent causing because of gas flow rate problem the precision of experiment;
(4) dehumidifier is equipped with in experimental box body inside, and the signal that dehumidifier sends according to PLC control module is realized Push And Release automatically, thereby reaches the relative humidity in accurate control casing;
(5) in experimental box body, be provided with water spray and salt fog device, can meet the accelerated corrosion of metal under varying environment.
Accompanying drawing explanation
Fig. 1 is the structural representation that transformer station of the present invention metal parts accelerates rotten device;
Fig. 2 is the schematic diagram of metal lacing film of the present invention;
Fig. 3 is the test schematic diagram of this metal lacing film;
In figure: 1, heat-insulation layer; 2, draft tube; 3, every wet plate; 4, electric hot plate; 5, gas control valve; 6, salt atomizing nozzle; 7, metal lacing film; 8, humidity sensor; 9, temperature sensor; 10, gas outlet; 11, thermal insulative board; 12, wetness; 13, vent valve; 14, temperature indicator; 15, etchant gas display; 16, PLC control module; 17, control panel; 18, atomizer; 19, experimental box body; 20, etchant gas sensor; 21, rack; 22, dehumidifier; 23, gas meter; 24, exhaust fan; 25, buffer board; 26, circulation exhaust fan; 27, pump; 28, reserve tank; 29, etchant gas generating means; 30, solenoid valve; 31, liquid level gauge; 32, saturated air bucket; 33, gas admittance valve; 34, gas piping.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail.
Referring to accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, the structure of apparatus of the present invention is: comprise control panel 17, experimental box body 19, main box, etchant gas generating means and saturated air bucket,
Described main box is separated into three of upper, middle and lower part by the thermal insulative board 11 every wet plate 3 and top of bottom;
On main box, on the control panel of part, be provided with wetness 14, temperature indicator 12, etchant gas display 15 and PLC control module 16; Described PLC control module 16 detects controller by temperature and humidity controller, gas and the time relay three parts form, it adopts existing control module, various controller all can be realized this type of and control function, such as adopting HC6800ES-V1.0 module and the XCZ-100F module of general middle scientific and technological development.
The middle part of main box is provided with experimental box body 19, electric hot plate 4 and circulation exhaust fan 26;
The latter half of main box is provided with etchant gas generating means 29, saturated air bucket 32, reserve tank 28 and pump 27.
On control panel, wetness 12, temperature indicator 14, etchant gas display 15 and PLC control module 16 are in same level, and wetness 12, temperature indicator 14 and etchant gas display 15 are connected with humidity sensor 8, temperature sensor 9 and etchant gas sensor 20 in experimental box body 19 respectively, then are connected with PLC control module 16.
Atomizer 18 is equipped with on described experimental box body 19 tops, and atomizer 18 is connected with pump 27, reserve tank 28 by water pipe, and pump 27 switches are connected in PLC control module 16.
Salt atomizing nozzle 6 and dehumidifier 22 are equipped with in described experimental box body 19 bottoms, and salt atomizing nozzle 6, gas control valve 5 and draft tube 2 are connected, and dehumidifier 22 is with salt atomizing nozzle 6 in same level, and its inside is equipped with dehumidizier, and is connected with PLC control module 16.Gas meter 23 on described experimental box body 19 panels is connected with saturated air bucket 32, etchant gas generating means 29.
Described main box middle part electric hot plate 4 and the bottom of circulation exhaust fan 26 in experimental box body 19, and be positioned at same level, be connected with the PLC control module 16 on control panel respectively simultaneously.In described experimental box body, be provided with a buffer board 25, this buffer board 25 is positioned at gas piping air intake opening position, and buffer board 25 is that surface has the rectangle corrosion-resistant plate that many diameters are 5mm aperture.Gas meter on described experimental box body panel is connected with saturated air bucket, etchant gas generating means.Described electric hot plate and the bottom of circulation exhaust fan in experimental box body, and be positioned at same level, be connected with the PLC control module 16 on control panel respectively simultaneously.
The inventive method is specially:
Metal lacing film corrosion front and rear surfaces is processed:
Metal lacing film is first used sand papering before carrying out corrosion experiment, till polishing successively and cannot see to the front vestige of once polishing by 3#, 5#, 6# order from coarse to fine, while changing the polishing of sand paper model at every turn, polishing direction changes 90 degree, polish to metal lacing film surface-brightening as mirror, then with distilled water, clean, then putting into absolute ethyl alcohol cleans, finally with acetone, fully clean, after cleaning, cold wind dries up, with epoxy resin, seal again four limits of metal lacing film, put into the exsiccator that fills silica gel and store.Each every group of parallel sample of test material is 3, and metal lacing film is rectangular parallelepiped, and the requirement of its size conforms Fig. 2 is specifically of a size of 50 * 25 * 2 mm(length * wide * height), the thickness of application epoxy resin is at 1～10 mm.
Before carrying out corrosion experiment, the metal lacing film weight that successively twice measurement made, the result of measuring weight for twice differs at 0.1mg, can be for carrying out corrosion experiment.Metal lacing film records its original weight before putting experimental box into, and with fine rule, metal lacing film is hung on rack, and the suspension height of each metal lacing film is consistent.
The careful clean surface of distilled water for metal lacing film after test, cold wind dries up afterwards, then puts into the exsiccator that fills silica gel and store 24 h, and metal lacing film is weighed.
Test specific operation process is as follows:
(1) device connects power supply, and in PLC control module 16, set temperature, humidity and etchant gas are containing numerical quantity.
(2) open gas admittance valve 33, open electric hot plate 4 and circulation exhaust fan 26 simultaneously, make the temperature and humidity of experimental box body 19 reach setting value.
(3) on rack 21, hang metal lacing film 7, then close rapidly chamber door.
(4) open solenoid valve 30, adjusting gas flow meter 23, makes etchant gas content reach the required numerical value of experiment simultaneously.
(5) according to experiment needs, open gas control valve 5 and pump 27.
(6) start record, after experiment finishes, open vent valve 24, finally close instrument, disconnected power down source.
Complete after stipulated time corrosion experiment and stop test, using the average surrosion of lacing film unit area as transformer station's metal parts accelerated corrosion evaluation method.
The present invention by experiment chamber accelerated corrosion experiment Lai Dui transformer station metal parts accelerated corrosion sets up a kind of evaluation method, for transformer substation construction and daily servicing provide the suggestion with reference value.
Be more than for the illustrating of possible embodiments of the present invention, but this embodiment is not only in order to limit the scope of the claims of the present invention, allly do not depart from equivalence of the present invention and implement or change, all should be contained in the scope of the claims of the present invention.
Claims (9)
1.Yi Zhong transformer station metal parts accelerated corrosion device, is characterized in that: it comprises a main box, and described main box is divided into three of upper, middle and lower part by the thermal insulative board (11) every wet plate (3) and top that is positioned at its underpart;
Wherein, main box top is arranged with control panel (17), is provided with wetness (12), temperature indicator (14), etchant gas display (15) and PLC control module (16) on described control panel (17),
The middle part of main box is provided with experimental box body (19), described experimental box body (19) inside is provided with rack (21), described rack (21) is provided with metal lacing film to be tested, the bottom of described experimental box body (19) is provided with electric hot plate (4) and circulation exhaust fan (26), humidity sensor (8) in being provided with in described experimental box body, temperature sensor (9) and etchant gas sensor (20), described humidity sensor (8), temperature sensor (9) and etchant gas sensor (20) respectively with wetness (12), temperature indicator (14), etchant gas display (15), described humidity sensor (8), temperature sensor (9) and etchant gas sensor (20) all connect PLC control module (16), the top of described experimental box body is provided with escape pipe (10),
The bottom of main box is divided and is provided with etchant gas generating means (29) and saturated air bucket (32), described etchant gas generating means is communicated with draft tube (2), described saturated air bucket (32) connects experimental box body (19) through gas piping (34), described etchant gas generating means (29) connects gas piping (34) by the pipeline of provided with electromagnetic valve (30), and described gas piping is connected with the gas meter (23) being arranged on experimental box body (19).
2. transformer station according to claim 1 metal parts accelerated corrosion device, it is characterized in that: also comprise the atomizer (18) of being located at experimental box body (19) top, described atomizer (18) is communicated with the reserve tank (28) that is positioned at main box bottom via the pipeline with pump, the control termination PLC control module (16) of described pump (27).
3. transformer station according to claim 2 metal parts accelerated corrosion device, it is characterized in that: also comprise salt fog device, this salt fog device comprises salt atomizing nozzle (6) and the dehumidifier (22) that is positioned at experimental box body (19) bottom, described salt atomizing nozzle (6) is connected with draft tube (2) by the pipeline of band gas control valve (5), described dehumidifier (22) and salt atomizing nozzle (6) are in same level, dehumidizier is equipped with in its inside, and the control end of dehumidifier (22) is connected with PLC control module (16).
4. according to the transformer station's metal parts accelerated corrosion device described in claim 1-3 any one, it is characterized in that: in described experimental box body (19), be provided with the buffer board (25) matching with gas piping (34) air intake opening position.
5. transformer station according to claim 4 metal parts accelerated corrosion device, is characterized in that: described buffer board (25) is for opening foraminate rectangle corrosion-resistant plate in surface.
6. according to the transformer station's metal parts accelerated corrosion device described in claim 1-3 any one, it is characterized in that: described wetness (12), temperature indicator (14), etchant gas display (15) and PLC control module (16) are in same level, and described main box sidewall is provided with exhaust fan (24).
7. according to the transformer station's metal parts accelerated corrosion device described in claim 1-3 any one, it is characterized in that: described electric hot plate (4) and circulation exhaust fan (26) are in same level.
8. the corrosion evaluation method of transformer station claimed in claim 1 metal parts accelerated corrosion device, is characterized in that: the method comprises the following steps:
1) metal lacing film is processed: metal lacing film is first used sand papering before carrying out corrosion experiment, till polishing successively and cannot see to the front vestige of once polishing by 3#, 5#, 6# order from coarse to fine, while changing the polishing of sand paper model at every turn, polishing direction changes 90 degree, polish to metal lacing film surface-brightening as mirror, then with distilled water, clean, then putting into absolute ethyl alcohol cleans, finally with acetone, fully clean, after cleaning, cold wind dries up, with epoxy resin, seal again four limits of metal lacing film, put into the exsiccator that fills silica gel and store; Each every group of parallel sample of test material is 3, and metal lacing film is rectangular parallelepiped, and its length * wide * height is 50 * 25 * 2 mm, and the thickness of application epoxy resin is at 1～10 mm;
Before carrying out corrosion experiment, the metal lacing film weight that successively twice measurement made, the result of measuring weight for twice differs at 0.1mg, can be for carrying out corrosion experiment; Metal lacing film records its original weight before putting experimental box into, and with fine rule, metal lacing film is hung on rack, and the suspension height of each metal lacing film is consistent;
2) corrosive gas that etchant gas generating means (29) is produced enters in experimental box body (19), control temperature, relative humidity and the volume fraction of corrosive gas, complete after stipulated time corrosion experiment, using the average surrosion of lacing film unit area as transformer station's metal parts accelerated corrosion evaluation method; According to experiment needs, open gas control valve (5) and pump (27);
Described metal lacing film (7) takes out 3 as one group, with the average weight gain calculating corrosion rate of 3 lacing film unit areas after each accelerated corrosion experiment.
9. corrosion evaluation method according to claim 8, is characterized in that: the temperature of described etchant gas is controlled at 25～40 ℃, and relative humidity is controlled RH and is controlled at 40～90%, and volume fraction is controlled at 0～100 ppm.
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